// bflink plugin setup - replaces standard ckeditor link with a variety of link dialogs and commands

CKEDITOR.plugins.add( 'bflink', {
	init : function(editor) {
		// Add base dialogs
		editor.addCommand('link', new CKEDITOR.dialogCommand('link'));				// web links
		editor.addCommand('wikilink', new CKEDITOR.dialogCommand('wikilink'));		// wiki links
		editor.addCommand('doclink', new CKEDITOR.dialogCommand('doclink'));		// doc links
		editor.addCommand('threadlink', new CKEDITOR.dialogCommand('threadlink'));	// discussion links
		editor.addCommand('userlink', new CKEDITOR.dialogCommand('userlink'));		// user links
		editor.addCommand('commlink', new CKEDITOR.dialogCommand('commlink'));		// community links
		editor.addCommand('newwiki', new CKEDITOR.dialogCommand('newwiki'));		// create and link to new wiki page
		editor.addCommand('newdoc', new CKEDITOR.dialogCommand('newdoc'));			// upload and link to new document
		editor.addCommand('anchor', new CKEDITOR.dialogCommand('anchor'));			// link to anchor in current page
		editor.addCommand('unlink', new CKEDITOR.unlinkCommand());
		CKEDITOR.dialog.add('link', this.path + 'dialogs/link.js');
		CKEDITOR.dialog.add('wikilink', this.path + 'dialogs/link.js');
		CKEDITOR.dialog.add('doclink', this.path + 'dialogs/link.js');
		CKEDITOR.dialog.add('threadlink', this.path + 'dialogs/link.js');
		CKEDITOR.dialog.add('userlink', this.path + 'dialogs/link.js');
		CKEDITOR.dialog.add('commlink', this.path + 'dialogs/link.js');
		CKEDITOR.dialog.add('newwiki', this.path + 'dialogs/link.js');
		CKEDITOR.dialog.add('newdoc', this.path + 'dialogs/link.js');
		CKEDITOR.dialog.add('anchor', this.path + 'dialogs/anchor.js');
		// Add the CSS styles for anchor placeholders.
		editor.addCss(
			'img.cke_anchor' +
			'{' +
				'background-image: url(' + CKEDITOR.getUrl( this.path + 'images/anchor.gif' ) + ');' +
				'background-position: center center;' +
				'background-repeat: no-repeat;' +
				'border: 1px solid #a9a9a9;' +
				'width: 18px;' +
				'height: 18px;' +
			'}\n' +
			'a.cke_anchor' +
			'{' +
				'background-image: url(' + CKEDITOR.getUrl( this.path + 'images/anchor.gif' ) + ');' +
				'background-position: 0 center;' +
				'background-repeat: no-repeat;' +
				'border: 1px solid #a9a9a9;' +
				'padding-left: 18px;' +
			'}'
		);

		// Register selection change handler for the unlink button.
		editor.on('selectionChange', function(evt)	{
			/*
			 * Despite our initial hope, document.queryCommandEnabled() does not work
			 * for this in Firefox. So we must detect the state by element paths.
			 */
			var command = editor.getCommand( 'unlink' ),
				element = evt.data.path.lastElement.getAscendant( 'a', true );
			if (element && element.getName() == 'a' && element.getAttribute('href')) {
				command.setState( CKEDITOR.TRISTATE_OFF );
			} else {
				command.setState( CKEDITOR.TRISTATE_DISABLED );
			}
		});
		// If the "menu" plugin is loaded, register the menu items.
		if (editor.addMenuItems) {
			editor.addMenuItems({
				anchor :
				{
					label : editor.lang.anchor.menu,
					command : 'anchor',
					group : 'anchor'
				},

				link :
				{
					label : editor.lang.link.menu,
					command : 'link',
					group : 'link',
					order : 1
				},

				unlink :
				{
					label : editor.lang.unlink,
					command : 'unlink',
					group : 'link',
					order : 5
				}
			});
		}
		// If the "contextmenu" plugin is loaded, register the listeners.
		if (editor.contextMenu) {
			editor.contextMenu.addListener(function(element, selection) {
				if (!element) { return null; }
				var isAnchor = (element.is('img') && element.getAttribute('_cke_real_element_type') == 'anchor');
				if (!isAnchor) {
					if (!(element = element.getAscendant('a', true))) { return null; }
					isAnchor = (element.getAttribute('name') && !element.getAttribute('href'));
				}
				return isAnchor ?
						{ anchor : CKEDITOR.TRISTATE_OFF } :
						{ link : CKEDITOR.TRISTATE_OFF, unlink : CKEDITOR.TRISTATE_OFF };
			});
		}
	},

	afterInit : function( editor )
	{
		// Register a filter to displaying placeholders after mode change.

		var dataProcessor = editor.dataProcessor,
			dataFilter = dataProcessor && dataProcessor.dataFilter;

		if ( dataFilter )
		{
			dataFilter.addRules(
				{
					elements :
					{
						a : function( element )
						{
							var attributes = element.attributes;
							if (attributes.name && !attributes.href) {
								return editor.createFakeParserElement(element, 'cke_anchor', 'anchor');
							}
						}
					}
				});
		}
	},
	requires : [ 'fakeobjects' ]
} );

CKEDITOR.unlinkCommand = function(){};
CKEDITOR.unlinkCommand.prototype =
{
	/** @ignore */
	exec : function( editor )
	{
		/*
		 * execCommand( 'unlink', ... ) in Firefox leaves behind <span> tags at where
		 * the <a> was, so again we have to remove the link ourselves. (See #430)
		 *
		 * TODO: Use the style system when it's complete. Let's use execCommand()
		 * as a stopgap solution for now.
		 */
		var selection = editor.getSelection(),
			bookmarks = selection.createBookmarks(),
			ranges = selection.getRanges(),
			rangeRoot,
			element;

		for (var i = 0 ; i < ranges.length ; i++) {
			rangeRoot = ranges[i].getCommonAncestor(true);
			element = rangeRoot.getAscendant('a', true);
			if (!element) {
				continue;
			}
			ranges[i].selectNodeContents( element );
		}
		selection.selectRanges( ranges );
		editor.document.$.execCommand( 'unlink', false, null );
		selection.selectBookmarks( bookmarks );
	}
};